<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>Graphics/Rendering/OpenGL/GL/BufferMode.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>-- #hide</span> <a name="line-2"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-3"></a><span class='hs-comment'>-- |</span> <a name="line-4"></a><span class='hs-comment'>-- Module : Graphics.Rendering.OpenGL.GL.BufferMode</span> <a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span> <a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span> <a name="line-7"></a><span class='hs-comment'>-- </span> <a name="line-8"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span> <a name="line-9"></a><span class='hs-comment'>-- Stability : stable</span> <a name="line-10"></a><span class='hs-comment'>-- Portability : portable</span> <a name="line-11"></a><span class='hs-comment'>--</span> <a name="line-12"></a><span class='hs-comment'>-- This is a purely internal module for (un-)marshaling BufferMode.</span> <a name="line-13"></a><span class='hs-comment'>--</span> <a name="line-14"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-15"></a> <a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>BufferMode</span> <span class='hs-layout'>(</span> <a name="line-17"></a> <span class='hs-conid'>BufferMode</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>marshalBufferMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>unmarshalBufferMode</span> <a name="line-18"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-19"></a> <a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>BasicTypes</span> <span class='hs-layout'>(</span> <span class='hs-conid'>GLenum</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLsizei</span> <span class='hs-layout'>)</span> <a name="line-21"></a> <a name="line-22"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-23"></a> <a name="line-24"></a><span class='hs-comment'>-- | The set of color buffers which are selected for reading and writing.</span> <a name="line-25"></a> <a name="line-26"></a><a name="BufferMode"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>BufferMode</span> <span class='hs-keyglyph'>=</span> <a name="line-27"></a> <span class='hs-conid'>NoBuffers</span> <a name="line-28"></a> <span class='hs-comment'>-- ^ No color buffers are selected.</span> <a name="line-29"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FrontLeftBuffer</span> <a name="line-30"></a> <span class='hs-comment'>-- ^ Only the front left color buffer is selected.</span> <a name="line-31"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FrontRightBuffer</span> <a name="line-32"></a> <span class='hs-comment'>-- ^ Only the front right color buffer is selected.</span> <a name="line-33"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BackLeftBuffer</span> <a name="line-34"></a> <span class='hs-comment'>-- ^ Only the back left color buffer is selected.</span> <a name="line-35"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BackRightBuffer</span> <a name="line-36"></a> <span class='hs-comment'>-- ^ Only the back right color buffer is selected.</span> <a name="line-37"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FrontBuffers</span> <a name="line-38"></a> <span class='hs-comment'>-- ^ Only the front left and front right color buffers are selected. If</span> <a name="line-39"></a> <span class='hs-comment'>-- there is no front right color buffer, only the front left color buffer</span> <a name="line-40"></a> <span class='hs-comment'>-- is selected.</span> <a name="line-41"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BackBuffers</span> <a name="line-42"></a> <span class='hs-comment'>-- ^ Only the back left and back right color buffers are selected. If there</span> <a name="line-43"></a> <span class='hs-comment'>-- is no back right color buffer, only the back left color buffer is</span> <a name="line-44"></a> <span class='hs-comment'>-- selected.</span> <a name="line-45"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LeftBuffers</span> <a name="line-46"></a> <span class='hs-comment'>-- ^ Only the front left and back left color buffers are selected. If there</span> <a name="line-47"></a> <span class='hs-comment'>-- is no back left color buffer, only the front left color buffer is</span> <a name="line-48"></a> <span class='hs-comment'>-- selected.</span> <a name="line-49"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>RightBuffers</span> <a name="line-50"></a> <span class='hs-comment'>-- ^ Only the front right and back right color buffers are selected. If</span> <a name="line-51"></a> <span class='hs-comment'>-- there is no back right color buffer, only the front right color buffer</span> <a name="line-52"></a> <span class='hs-comment'>-- is selected.</span> <a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FrontAndBackBuffers</span> <a name="line-54"></a> <span class='hs-comment'>-- ^ All the front and back color buffers (front left, front right, back</span> <a name="line-55"></a> <span class='hs-comment'>-- left, back right) are selected. If there are no back color buffers, only</span> <a name="line-56"></a> <span class='hs-comment'>-- the front left and front right color buffers are selected. If there are</span> <a name="line-57"></a> <span class='hs-comment'>-- no right color buffers, only the front left and back left color buffers</span> <a name="line-58"></a> <span class='hs-comment'>-- are selected. If there are no right or back color buffers, only the</span> <a name="line-59"></a> <span class='hs-comment'>-- front left color buffer is selected.</span> <a name="line-60"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>AuxBuffer</span> <span class='hs-conid'>GLsizei</span> <a name="line-61"></a> <span class='hs-comment'>-- ^ Only the given auxiliary color buffer no. /i/ is selected.</span> <a name="line-62"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span> <a name="line-63"></a> <a name="line-64"></a><a name="marshalBufferMode"></a><span class='hs-definition'>marshalBufferMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BufferMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>GLenum</span> <a name="line-65"></a><span class='hs-definition'>marshalBufferMode</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-66"></a> <span class='hs-conid'>NoBuffers</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x0</span> <a name="line-67"></a> <span class='hs-conid'>FrontLeftBuffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x400</span> <a name="line-68"></a> <span class='hs-conid'>FrontRightBuffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x401</span> <a name="line-69"></a> <span class='hs-conid'>BackLeftBuffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x402</span> <a name="line-70"></a> <span class='hs-conid'>BackRightBuffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x403</span> <a name="line-71"></a> <span class='hs-conid'>FrontBuffers</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x404</span> <a name="line-72"></a> <span class='hs-conid'>BackBuffers</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x405</span> <a name="line-73"></a> <span class='hs-conid'>LeftBuffers</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x406</span> <a name="line-74"></a> <span class='hs-conid'>RightBuffers</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x407</span> <a name="line-75"></a> <span class='hs-conid'>FrontAndBackBuffers</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-num'>0x408</span> <a name="line-76"></a> <span class='hs-conid'>AuxBuffer</span> <span class='hs-varid'>i</span> <a name="line-77"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><=</span> <span class='hs-num'>246</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-num'>0x409</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <a name="line-78"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span> <a name="line-79"></a> <a name="line-80"></a><a name="unmarshalBufferMode"></a><span class='hs-definition'>unmarshalBufferMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BufferMode</span> <a name="line-81"></a><span class='hs-definition'>unmarshalBufferMode</span> <span class='hs-varid'>x</span> <a name="line-82"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoBuffers</span> <a name="line-83"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x400</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FrontLeftBuffer</span> <a name="line-84"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x401</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FrontRightBuffer</span> <a name="line-85"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x402</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BackLeftBuffer</span> <a name="line-86"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x403</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BackRightBuffer</span> <a name="line-87"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x404</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FrontBuffers</span> <a name="line-88"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x405</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BackBuffers</span> <a name="line-89"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x406</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LeftBuffers</span> <a name="line-90"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x407</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RightBuffers</span> <a name="line-91"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x408</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FrontAndBackBuffers</span> <a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-num'>0x409</span> <span class='hs-varop'><=</span> <span class='hs-varid'>x</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-num'>0x4ff</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AuxBuffer</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span> <span class='hs-comment'>-</span> <span class='hs-num'>0x409</span><span class='hs-layout'>)</span> <a name="line-93"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"unmarshalBufferMode: illegal value "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> </pre></body> </html>
